Establishing minimum clinically important difference values for the Patient-Reported Outcomes Measurement Information System Physical Function, hip disability and osteoarthritis outcome score for joint reconstruction, and knee injury and osteoarthritis outcome score for joint reconstruction in orthopaedics

Table 2 Anchor-based methods for minimum clinically important difference determination of the PROMIS PF CAT, HOOS JR and KOOS JR

Instrument	n	No change (SD)	n	Mean change (SD)	ROC cut-off
3-mo from baseline follow-up
PF CAT	54	6.95 (6.70)	88	7.60 (4.98)	1.97
HOOS JR	6	22.81 (10.10)	24	14.81 (12.45)	43.36
KOOS JR	14	10.49 (10.00)	37	14.51 (9.76)	7.24
> 3-mo from baseline follow-up
PF CAT	366	6.02 (5.40)	577	7.29 (7.31)	3.44
HOOS JR	48	14.34 (15.23)	110	18.49 (12.53)	8.07
KOOS JR	96	12.71 (12.62)	151	14.82 (12.56)	8.16
6-mo from baseline follow-up
PF CAT	21	4.36 (4.32)	34	8.41 (6.12)	3.52
HOOS JR	6	6.62 (5.87)	5	19.68 (18.65)	7.45
KOOS JR	12	13.49 (11.07)	14	18.85 (12.82)	6.12
> 6-mo from baseline follow-up
PF CAT	192	6.44 (5.83)	421	7.69 (6.75)	8.18
HOOS JR	76	12.58 (11.61)	57	17.57 (13.92)	6.33
KOOS JR	81	12.45 (10.77)	64	15.47 (13.38)	2.21